For a few minutes at a time, some Costco gold bars can be bought and immediately resold for substantially more than they cost.
These are real Costco listings where rewards plus broker buyback pricing created immediate resale profit. ROI compares profit to the Costco purchase price; broker buyback assumes spot − 0.65%.
Five tools that do the heavy lifting — inventory, payouts, profit math, alerts, and SMS — plus the secondary surfaces that round it out. Every section below maps to a screen in the product.
Every gold and silver SKU Costco lists, with the four largest precious-metal buyers' bids refreshing continuously. Best bid per product highlighted automatically. Each row expands to show your real payout after Venmo, Citi Plus, or VentureX cashback — no calculator required.
Watch how gold and silver inventory has moved across Costco's entire US warehouse network — overlaid against the gold spot price so you can see exactly when stock spikes and crashes happen. Drop in your zip code to find the closest stores with current inventory. You can also track how Costco gold inventory has moved week over week in our running price-and-restock report.
VentureX on one purchase, Citi Plus on the next, Venmo for the online order. Configure each card or payment method as its own profile — cashback %, Costco Executive bonus, additional cashback, shipping, sales tax — and toggle profiles on or off any time. The math reprices instantly across every screen.
Set a profit threshold against the brokers and profiles you trust — or let the system flag any Costco product priced near or below spot, automatically. Every rule shows current status, channels, last-fired time, and target config so you always know what's running.
Gold is near record highs and the sub-1% premium windows are tiny — sometimes seconds, rarely more than minutes. SMS is the only channel that beats those numbers. We bake the SKU, premium tier, store distance, and a one-tap product link into every text, so you can move before anyone else has even opened their email.
Beyond the core five, these are the everyday tools — anomaly detection, spot-price alerts, the live event stream, and your portfolio.
Automatically flags Costco prices that approach or fall below spot — no user threshold required.
Get notified when gold or silver crosses your target threshold. Single-fire by design.
Track every Costco buy and broker sell. P&L, hold time, and cost-basis math all roll up automatically.
Every confirmed restock and stock-out across all warehouses as it happens — premium-over-spot tagged and time-stamped.
Three things we do that nobody else in this space does — and a head-to-head against the typical alternatives.
Our hot tier polls Costco's bulk API every 30 seconds — a third faster than the 45-second cadence common in this space. End-to-end alert latency typically lands under 60 seconds.
SMS is the channel for under-minute windows. Email and push fan out in parallel for everything else. Our Slack bot delivers the same alerts straight into your workspace — and our Slack community is where active buyers compare notes in real time.
When Costco lists a product close to or below spot, our system catches it automatically — no threshold setup required. This catches genuine pricing errors that competitor tools miss entirely.
Every confirmed alert is backed by 5 visible scans in your dashboard — and cancelled false detections stay visible with their exact mismatch count. Every notification carries a dispatch timestamp so you can audit channel-by-channel delivery in milliseconds, not "sometime last hour".
| Capability | Gold Alerts | Other tools / manual |
|---|---|---|
| Scan cadenceHow often we re-check Costco for inventory changes | Every 30 seconds (hot tier) | Typically 45–60 seconds |
| SMS deliveryBrand-prefixed text with SKU, store, price, premium | Native | Not offered |
| Slack bot + communitySame alerts in your workspace · active buyer community | Yes | Yes |
| Email deliveryRich-format with one-tap dashboard link | Yes | Yes |
| Web PushBrowser + mobile push notifications | Yes | Yes |
| In-store inventoryEvery U.S. warehouse, every SKU, continuously watched | Yes | Yes |
| Online inventoryCostco.com ShipIt — gold and silver | Yes | Yes |
| Live broker payoutsBGS, CollectPure, DCB, Ali Incentive · refreshed continuously | 4 brokers · live | Static lookup tables |
| Profit calculator with profile stackCashback + membership + fees + shipping + tax | Personalized | Generic estimator |
| Anomaly detectionAutomatically catches Costco prices near or below spot | Yes | Not offered |
| Variant linkingSame product, different SKU numbers — unified in the UI | Yes | Duplicate alerts |
| Audited scan historySee every scan that led to each confirmation — and every cancelled false detection | Full transcript | Black box |
| Per-channel delivery receiptsMillisecond timestamps for SMS / email / push dispatch | <1s · audited | No receipts |
| ROI guaranteeOne bar at the right premium clears a year of Premium | $150 / year · self-paying | $25–$50 / month · break-even unclear |
| Daily search limitHow many lookups you can run per day | Unlimited | Varies |
No user-driven scans. No daily digest. The pipeline is built like a trading bus: continuous, batched, and out the door the second a decision is made.
Costco's precious-metals search endpoint returns the live availability table.
Five consecutive matching scans confirm a restock. False detections drop out automatically.
Match alerts against personalized profit thresholds, premium tiers, and cooldowns.
SMS, email, and push dispatched in parallel — each with a millisecond timestamp logged in your alert history.
Real product metrics — not marketing math.
From a Costco inventory change to an SMS on your phone — typically under one minute, often closer to 30 seconds.
Every restock or out-of-stock event must pass five consecutive matching scans before an alert fires. False positives are designed out.
Every gold and silver SKU Costco currently sells — bars, coins, and ShipIt-eligible variants — tracked automatically the moment it lists.
One bar caught at the right premium clears the cost of a full year. Add a credit-card signup bonus on the same buy, and the math goes from "pays for itself" to "pays for the next three years." You don't need a string of wins — you need one.
One additional bar. One signup bonus. The year is covered.
Max Stacker runs $15 / month, or $150 / year. A single PAMP 1 oz at under 1.5% over spot with cashback nets $70–$100. An anomaly catch (Costco listing near or below spot) clears $200+ on its own. A first-buy credit-card signup bonus typically adds $200–$600 on top. Any one of those — let alone the combination — and your subscription is already in the green for the year.
The bulk API runs on a 30-second hot tier. The end-to-end path from a Costco inventory change to an SMS on your phone is typically under one minute, often closer to 30 seconds. We don't batch, queue overnight, or hold for digests — the second a five-scan confirmation passes, dispatch fires in parallel across every channel.
No. Max Stacker comes with unlimited searches — the product does the searching for you anyway, since it scans the catalog continuously on a 30-second cadence.
Four live: BGS, CollectPure, DCB, and AlignedIncentives (labeled "Ali Incentive" in the UI). Each refreshes their bid table continuously; we pull on a ~30-second cadence and push to your dashboard in real time.
Every confirmed restock or stock-out is backed by 5 consecutive matching scans. Each scan in that sequence is visible in your dashboard, including the timestamp and matched fields. Cancelled false detections (sessions that fell short of 5 matches) are also surfaced with the exact mismatch count — so you can audit when the system second-guessed itself and why.
Once a confirmation passes, dispatch fires across SMS, email, and push in parallel within a sub-second window. Every alert in your history shows the millisecond-precise dispatch timestamp for each channel — no black box. Typical end-to-end latency from inventory drop to your phone is well under a minute.
Every text is brand-prefixed with [Gold Alerts], includes the SKU, store and distance, Costco price, current spot, premium percentage, and a one-tap link to the live product page. We respect quiet hours and per-alert 3-hour cooldowns.
Three things: (1) SMS as a first-class channel — on top of email, push, and our Slack bot. (2) 30-second scan cadence vs. the 45-second cadence common in this space. (3) Anomaly detection — we automatically catch Costco prices near or below spot with zero user configuration. See the comparison table above for the full head-to-head.
Inside the app you get 30 / 60 / 90-day stock history, the live US warehouse map, and zip-code search. For a free public overview — current SKUs, typical premium over spot, how often Costco restocks, and how fast bars sell out — see our weekly Costco gold price & restock report, updated every week.
Max Stacker runs $15 a month, or $150 a year. A single PAMP 1 oz purchase at under 1.5% over spot nets $70–$100 after cashback and broker payout. A single anomaly catch (a Costco listing near or below spot) clears $200+ on its own. If we surface one opportunity you'd have missed in a year, the subscription has already paid for itself — and most users hit that mark in week one.
No contract, no minimum term. Cancel any time and you keep alerts until your billing period ends. We don't bury cancellation in a phone tree.
Max Stacker pays for itself in one trade. SMS in under a minute. Cancel anytime.
